What is happening exactly?

Question

Hey everyone. I‘m a litte lost here... what exactly happens here: d *= arr[x] ? I can‘t figure out the outcome of 4.5 logically :(

I‘d be grateful for any advice.

https://code.sololearn.com/cyzkRo671Rqc/?ref=app

Answer 1

d*=arr[x] means d=d*arr[x]
so first, d=1*3
then ,d=3*0.5
then,d=1.5*2
then ,d=3*1.5
so finally d=4.5

Answer 2

d *= arr[x]
Is same as
d = d * arr[x]

Answer 3

Now I get it :) I was confused with the * because I was working with pointers and , well, beginner‘s fault I guess :)

Answer 4

Yep, thank you.

Answer 5

Look if we assume that s is stands for sign then
X s= Y; will be X = X s Y
Like
X+=y
X-=y
X*=y
X/=y
X%=y
And other bitwise operators